navigation speed can be set
toggle wifreame in editor
right mouse location in the scene view is used
physical heightfield - scale
heightfield's height is matching terrain's height in the renderer
shadow matrices are sent to the terrain shader
fixed crash when game mode is turned off and there is a terrain in a scene
some cleaning; qt editor - release configuration configured
physics scene refactor
editor object icons restored after deserialization
texture can be kept in the graphic card's memory and in the main memory at the same time
reference counted data in textures
update according to review
Merge pull request #246 from nem0/scale_phy_heightfield

PhysX heightfield's scale can be set in the editor